Art Deco decadence for the cocktail hour, inspired by Agatha Christie. A design dripping in royal opulence, Monkshood is known as the 'Queen of poisons' and is considered to be the most poisonous plant in Europe. In Ancient Greece, Monkshood was believed to have been spawned from the saliva of the hound of Hades, Cerberus; the three-headed dog guarding the gates of the Underworld.